From cee51ecb2b38943ab03299b95f9e6a63d0768191 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Herv=C3=A9?=
 <159137+therve@users.noreply.github.com>
Date: Fri, 11 Jan 2019 02:45:50 +0100
Subject: [PATCH] Remove spurious libzwave error (#19928)

If a network_key is not configuired, the following error is logged:
TypeError: expected bytes, NoneType found
Exception ignored in: 'libopenzwave.str_to_cppstr'
TypeError: expected bytes, NoneType found

We don't need to set the key if it's None, let's skip in that case.
---
 homeassistant/components/zwave/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/homeassistant/components/zwave/__init__.py b/homeassistant/components/zwave/__init__.py
index 7860b545be2..093e6071bb4 100644
--- a/homeassistant/components/zwave/__init__.py
+++ b/homeassistant/components/zwave/__init__.py
@@ -284,7 +284,7 @@ async def async_setup_entry(hass, config_entry):
 
     options.set_console_output(use_debug)
 
-    if CONF_NETWORK_KEY in config_entry.data:
+    if config_entry.data.get(CONF_NETWORK_KEY):
         options.addOption("NetworkKey", config_entry.data[CONF_NETWORK_KEY])
 
     await hass.async_add_executor_job(options.lock)